Did you know?
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Species richness of birds in North America.
Basic energy of a human life
The human hypothalamus (in color) in relation to the optic chiasm and the pituitary gland.
Human Body Parts
Systems of the Human Body
The time spent in each interval of one complete cell cycle of a human cell in culture